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Related Concept Videos

Distillation: Vapor–Liquid Equilibria01:01

Distillation: Vapor–Liquid Equilibria

Distillation is a separation technique that takes advantage of the boiling point properties of disparate elements in a mixture. To perform distillation, we begin by heating a miscible mixture of two liquids with a significant difference in boiling points (at least 20°C). As the solution heats up and reaches the bubble point of the more volatile component, some molecules of the more volatile component transition into the gas phase and travel upward into the condenser, which is a glass tube with...
Two Components: Liquid–Liquid Systems01:27

Two Components: Liquid–Liquid Systems

A pressure-composition phase diagram explicitly describes the behavior of an ideal solution of two volatile liquids under varying pressures and compositions. A pressure-composition diagram has two main curves. The bubble point curve represents the plot of pressure versus liquid mole fraction. It indicates the pressure at which the first bubble of vapor forms from the liquid phase as the system pressure decreases.The dew point curve is the pressure versus vapor mole fraction. It indicates the...
Nonideal Two-Component Liquid Solutions01:29

Nonideal Two-Component Liquid Solutions

Nonideal liquid solutions, also known as real solutions, do not strictly follow Raoult's law. Raoult's law is a rule of thumb in physical chemistry. However, not all mixtures adhere to this law due to varying molecular interactions. For example, in an acetone/chloroform solution, the individual vapor pressures of the components are lower than expected, resulting in a total vapor pressure below that predicted by Raoult's law, causing a negative deviation.On the other hand, in an ethanol/water...
Dimensional Analysis01:27

Dimensional Analysis

Dimensional analysis is a valuable technique in fluid mechanics for simplifying complex problems by reducing them into dimensionless groups. These groups capture the essential relationships between the variables involved, allowing researchers and engineers to analyze fluid flow without dealing with each variable individually. This approach reduces the number of independent variables, allowing for easier analysis and better understanding of physical phenomena.
In fluid mechanics, dimensional...
Vapor Pressure of Fluid01:28

Vapor Pressure of Fluid

The vapor pressure of a fluid is a crucial concept in fluid mechanics, influencing phenomena such as boiling and cavitation. Vapor pressure refers to the pressure exerted by a vapor at a state of thermodynamic equilibrium with its corresponding liquid phase at a specific temperature. It represents the tendency of molecules to escape from the fluid surface into the vapor phase.
When a liquid is placed in a closed container with a small air space, and the space is evacuated, vapor molecules will...
Characteristics of Fluids01:20

Characteristics of Fluids

When a force is applied parallel to the top surface of a solid, it resists the applied force due to the internal frictional forces between the layers of the solid known as shearing resistance. However, when the force is removed, the shearing forces restore the original shape of the solid. Other deformation forces also cause temporary changes in shape if the forces are not beyond a threshold magnitude. Solids tend to retain their shape, making the study of their rest and motion easier. Beyond...

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Updated: Jun 17, 2026

Curtain Flow Column: Optimization of Efficiency and Sensitivity
06:44

Curtain Flow Column: Optimization of Efficiency and Sensitivity

Published on: June 12, 2016

Complex fluid analysis with the advanced distillation curve approach.

Thomas J Bruno1, Lisa S Ott, Beverly L Smith

  • 1National Institute of Standards and Technology, USA. bruno@boulder.nist.gov

Analytical Chemistry
|January 1, 2010
PubMed
Summary

A new distillation curve measurement method provides insights into the physicochemical properties of complex fluids like fuels. This advancement aids in understanding fuel behavior and composition.

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Area of Science:

  • Chemical Engineering
  • Analytical Chemistry

Background:

  • Distillation curves are crucial for characterizing complex fluids, including fuels.
  • Accurate measurement of distillation curves is essential for determining physicochemical properties.

Purpose of the Study:

  • To present an improved method for measuring distillation curves.
  • To demonstrate the utility of this method for revealing physicochemical properties of complex fluids.

Main Methods:

  • Development of an advanced apparatus for distillation curve measurement.
  • Application of the method to various complex fluid samples, including fuels.

Main Results:

  • The improved method provides precise and reliable distillation curve data.
  • Physicochemical properties derived from the new method correlate well with known fluid characteristics.

Conclusions:

  • The developed method offers a significant advancement in the analysis of complex fluids.
  • This technique enhances the understanding of fuel properties and performance.